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Conway Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

6.7

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

214.5 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In Conway, your appliances are currently losing 20% efficiency due to mineral buildup.

ApplianceIn ConwaySoft Water CityEfficiency Loss
Kettle
6.8 yrs
8.5 yrs-20%
Washing Machine
9.6 yrs
12 yrs-20%
Water Heater
12 yrs
15 yrs-20%

Regional Water Comparison

How Conway compares to its nearest neighbours

CityHardnessPFAS (ppt)RiskSource
Conway, South Carolina≈ 120–179 mg/L365.8 ppt🟠 Hardreservoir
Red Hill, South Carolina≈ 0–60 mg/L3.5 ppt🟢 Softreservoir
Socastee, South Carolina≈ 0–60 mg/L5.9 ppt🟢 Softreservoir
Myrtle Beach, South Carolina≈ 120–179 mg/L53.7 ppt🟠 Hardreservoir
Red Hill, South Carolina≈ 0–60 mg/L3.5 ppt🟢 Softreservoir

National Benchmark

How Conway compares to the USA average

BenchmarkHardnessAppliance Risk
Conway≈ 120–179 mg/L🟠 Moderate
USA National Avg151 mg/L🟠 Moderate
Scarsdale Top Rated0.02 mg/L🟢 None

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What Makes Conway's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 214.5 mg/LpH: 6.7

Conway, South Carolina is served by Conway Public Works Water, which draws from the Waccamaw River or Pee Dee River watershed reservoirs in Horry County. GSWSA (Georgetown-South Carolina Water and Sewer Authority) is referenced as a service area operator for Conway, and the utility's annual Consumer Confidence Report serves as the primary source for water quality data. Residents seeking detailed information may contact GSWSA directly or consult published water quality reports for contaminant levels and compliance status. Water quality concerns noted in the area include PFAS and chromium-6 contamination.

Conway's water supply drains the North and South Carolina Coastal Plain, where the geology features Cretaceous and Tertiary marine calcareous sediments and the Miocene Waccamaw Formation shell marl. The Waccamaw River watershed flows through these calcareous marine sediment deposits, which contribute dissolved calcium and magnesium to the supply. This coastal plain geological setting produces a moderately hard water characteristic of the Horry County, South Carolina region.

At moderately hard levels, Conway residents may notice mineral buildup on fixtures, reduced soap effectiveness, and gradual scale accumulation in water heaters and appliances. A water softener is recommended to extend appliance lifespan and improve cleaning efficiency. Regular descaling of kettles and showerheads will help manage mineral deposits, and laundry detergent performance may be slightly reduced. Given noted concerns about PFAS and chromium-6 contamination in the area, residents should consult the most recent Consumer Confidence Report and consider certified point-of-use filtration for additional protection, particularly for vulnerable populations.

Geology & Source: Waccamaw River and Pee Dee River watersheds — North and South Carolina Coastal Plain Cretaceous and Tertiary marine calcareous sediments, Miocene Waccamaw Formation shell marl; calcareous marine sediment drainage produces moderately hard water

Other South Carolina Water Reports

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Frequently Asked Questions

Is Conway's water safe to drink?
Yes. Conway's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.
Do I need a water softener in Conway?
At ≈ 120–179 mg/L (Hard), Conway's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.
How does Conway compare to the USA average?
The USA national average is 151 mg/L. Conway (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Conway is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

pH

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.